Food Plant: Acer pseudoplatanus (Sycamore) only.

Mine: Univoltine: early summer.

Notes: A large, upper surface marginal blotch, starting at the tip of a leaf lobe, usually going brown and with an excised hole, where the pupal disc drops off before leaf fall (as shown), which is characteristic of Heterarthrus species. A widespread miner of Sycamore. Previously a misidentification as Heterarthrus aceris Liston et al (2019).

Data: 06.vii.2005, Fleet, Hants,VC12

Image:© Rob Edmunds

References:
Liston, A, Mutanen, M, Viitasaari (2019) - On the taxonomy of Heterarthrus (Hymenoptera, Tenthredinidae), with a review of the West Palaearctic species, Journal of Hymenoptera Research, 72, 83-126